KR102510382B1 - Microwave oven, system and method for controlling microwave oven using single input start button - Google Patents

Abstract

There is provided a microwave oven with a control panel assembly having a limited number of operating buttons. The microwave oven has a control panel assembly having a first single input start button associated with a first preset cooking time or two single input start buttons associated with two preset cooking times. It has buttons to start typing.

Description

Microwave oven, system and method for controlling microwave oven using single input start button

The present invention relates to microwave ovens and methods of controlling microwave ovens using one or more single input start buttons. More specifically, the present invention relates to a microwave oven having a control panel assembly having a limited number of operating buttons.

In general, a microwave oven is a cooking appliance that cooks, reheats, or defrosts food using microwaves instead of other heating methods such as conduction, convection, or radiation.

The body of the microwave oven includes a chamber formed on one side to receive food to be cooked, and a microwave generator disposed on the other side to generate and radiate microwaves into the food in the chamber. have Usually, the control panel assembly is formed on the front face of the body. The control panel assembly has a front panel with a plurality of buttons for controlling the operation of the microwave oven and for selecting various functions of the microwave oven.

With the diversification of the microwave oven's functions, more buttons have been added to the front panel of the microwave oven. These additional functions are usually incorporated in an array of multiple single-function buttons or an array of several multi-function buttons on the front panel area of the microwave oven. By using multi-functional buttons, the number of functional buttons can be reduced compared to the use of single-functional buttons, and the appearance of the microwave oven can be simplified.

However, both types of microwave oven systems, such as a plurality of single-function buttons or several multi-function buttons, have disadvantages for users who want or require simplicity to use the microwave oven. In the aforementioned microwave oven control system, the user is required to perform many sequential steps to cook, heat or defrost food. These steps may be too complex and confusing for older users or those with dementia. As a result, these users may overheat the food by incorrectly setting the microwave heating time, resulting in potential burn or fire hazards.

U.S. Patent No. 8,835,821 describes a microwave oven having a one-touch button user interface wherein releasable one-touch buttons containing stored food and timing data are inserted into the microwave oven interface to activate a microwave heating cycle. there is. However, while the use of one-touch buttons simplifies the process of setting up and initiating a microwave heating cycle, the need for multiple, releaseable buttons for different foods that can be misconfigured or lost adds confusion and complexity to users. there is a possibility to do

Japanese patent application JP2000012212 describes a microwave oven equipped with setting means, wherein upon completion of an initial microwave heating cycle, subsequent microwave heating cycles may not be initiated until after expiration of a set time. Although the microwave settings described in JP2000012212 reduce the risk of potential burns and fire hazards resulting from multiple successive microwave heating cycles, from inadvertent time entry at the start of an initial microwave heating cycle. It does not address the risk of burns and fire hazards posed. Moreover, in cases where the initial microwave heating cycle is of insufficient duration to properly cook or reheat the food, the microwave oven setting of JP2000012212 allows the user to add additional heat without first waiting for the set time to expire. This prevents simple initiation of the microwave heating cycle.

Accordingly, there is a need for a microwave oven having a control panel assembly having a limited number of operation buttons that are easy to use.

The present invention relates to microwave ovens and systems for controlling microwave ovens. More specifically, the present invention relates to a microwave oven having a control panel assembly having a limited number of operating buttons.

It is an object of the present invention to provide an improved microwave oven that reduces the risk of user burns and fire hazard from overheated food, and a system for controlling the microwave oven.

According to an aspect of the present invention, a microwave oven is provided, the microwave oven comprising:

a main body forming a cooking chamber having a front opening;

a microwave generator for supplying microwaves to the cooking chamber;

a door movably mounted to the body to selectively close the opening;

a door sensor for detecting the open or closed state of the door; and

control panel assembly;

The control panel assembly includes one or more operation buttons, and the one or more operation buttons include one or more start buttons for starting microwave generation at a preset cooking time.

One or more start buttons are:

i) a first single input start button associated with a first preset cooking time; or

ii) a first single input start button and a second single input start button;

It may be provided, wherein the first start button is associated with a first preset cooking time, and the second start button is associated with a preset second cooking time.

The preset first cooking time may be, for example, 1 minute, and the preset second cooking time may be, for example, 2 minutes.

A preset cook time may be associated with one or more start buttons over one or more cook cycles. The preset cook time may be permanently associated with one or more start buttons, or the preset cook time may be user adjustable. The preset cook time is not reset upon completion of the cook cycle. The preset cook time remains associated with the one or more start buttons over one or more cook cycles. The preset cook time remains associated with one or more start buttons across multiple cook cycles.

The control panel assembly may further include an input panel having one or more preset cooking time buttons for inputting a preset cooking time, and a locking device for locking the input panel. The control panel assembly may further include a clock and a clock panel having a locking device. The locking device may be a cover. The control panel assembly includes a power level button, an add time button, a single digit button, a clear button, a delay start button, a defrost button ( defrost button, auto-defrost button, one or more convenience cooking buttons, auto-reheat button, off button, stop button, It does not have a clear button and/or other absent buttons.

The microwave oven is a concept including both a time reset means (means for resetting (resetting) the time) or a means for initializing the time, which resets the cooking time to 0 minutes when the door is opened. , which is the same throughout the specification) may be further provided. The microwave oven may further have signaling means to signal when the cooking time is complete. Additionally, microwave ovens may be equipped with smoke and/or vapor detectors. Activation of smoke and/or vapor detectors may activate signaling means. The signaling means may be a front panel light, an alarm system, or both. The signaling means may be preset for extended activation until the door of the microwave oven is opened by the user. Activation of the smoke and/or steam detector may stop the cook cycle and reset the cook time to zero minutes. Additionally, the microwave oven may have a rotatable carousel.

In another aspect of the present invention, a microwave oven is provided, the microwave oven comprising:

a main body forming a cooking chamber having a front opening;

a microwave generator for supplying microwaves to the cooking chamber;

a door movably mounted to the body to selectively close the opening;

a door sensor for detecting the open or closed state of the door; and

control panel assembly;

The control panel assembly includes one or more operation buttons, the one or more operation buttons are composed of a first single input start button and a second single input start button, wherein the first single input start button is set in advance. is permanently associated with the first cooking time, and the second single input start button is permanently associated with the preset second cooking time.

In another aspect of the present invention, a microwave oven is provided, the microwave oven comprising:

a main body forming a cooking chamber having a front opening;

a microwave generator for supplying microwaves to the cooking chamber;

a door movably mounted to the body to selectively close the opening;

a door sensor for detecting the open or closed state of the door; and

control panel assembly;

wherein the control panel assembly comprises one or more operating buttons, the one or more operating buttons consist of a single input start button, wherein the single input start button is associated with a user-adjustable preset cooking time; Here, the preset cooking time remains associated with the start button over multiple cooking cycles.

In another aspect, a control panel assembly for a microwave oven is provided, the assembly having one or more operating buttons, the one or more operating buttons including one or more start buttons for initiating microwave generation at a preset cooking time. Consists of

The one or more start buttons of the control panel assembly include: i) a first single input start button associated with a first preset cooking time; or ii) a first single input start button and a second single input start button, wherein the first start button is associated with a preset first cooking time, and the second start button is set in advance It is related to the second cooking time. The control panel may further include an input panel having one or more preset cooking time buttons for inputting a preset cooking time, and a locking device for locking the input panel. The control panel assembly may further include a clock and, optionally, a clock panel with a locking mechanism. The locking device may be a cover. The control panel assembly includes a power level button, extra time button, single number button, mute button, start standby button, defrost button, auto defrost button, one or more quick cook buttons, auto reheat button, power off button, stop button, clear button and /or do not have other member buttons.

1A is a perspective view of a single input microwave oven according to one embodiment. Fig. 1b shows an enlarged view of the input panel with a cover for the preset cook time buttons, the clock setting buttons, and the input panel. 2 shows a perspective view of a two input microwave oven according to a further embodiment.

The present invention relates to a microwave oven, comprising: a main body forming a cooking chamber having a front opening; a microwave generator for supplying microwaves to the cooking chamber; a door movably mounted to the body to selectively close the opening; a door sensor for detecting the open or closed state of the door; and a control panel assembly including one or more control buttons, and the one or more control buttons include one or more start buttons for initiating microwave generation at a preset cooking time.

One or more start buttons are:

i) a first single input start button associated with a first preset cooking time; or

ii) a first single input start button and a second single input start button;

It may be provided, wherein the first start button is associated with a first preset cooking time, and the second start button is associated with a preset second cooking time.

The present invention further relates to a microwave oven control panel, said microwave oven control panel having one (first) single input start button associated with a first preset cooking time, or a first single input start button. and a second single input start button, wherein the first start button is associated with a first preset cooking time, and the second start button is associated with a second preset cooking time.

In a microwave oven as described herein, a user cannot initiate a microwave cooking cycle for longer than a preset cooking time, but can only initiate another microwave heating cycle, which is an initial microwave heating cycle. This is the case when the heating cycle is complete, or when the microwave door is opened or a preset amount of time is automatically reset.

As described herein, a microwave oven having one single input start button associated with a preset cooking time or two single input start buttons associated with two preset cooking times can be operated by a user. It has been found that overheating of food can be minimized and/or prevented, if not, the user may consciously or mistakenly enter or program too many times for a microwave heating or cooking cycle, thereby May increase the risk of user burns or fire hazard. The microwave oven described herein is ideal for the elderly or for users with dementia whose multi-button interface is confusing, and programming microwave heating cycle times is not visually easy. Thus, the microwave oven disclosed herein may be suitable for use in, for example, a home, a senior home, or an assisted living facility.

"Operating button" means a user-operated button that controls any function related to the operation of the microwave oven. For example, the operation buttons may be one or more start buttons or one or more control buttons. Non-limiting examples of control buttons are start button, cook time button, power level button, extra time button, single number button, clear button, standby start button, defrost button or auto defrost button, quick cook button, auto reheat button, power off button, clear button and/or other member buttons associated with operation of the microwave oven. The quick-cook button may include pre-programmed settings for several food types such as meat, fish, poultry, vegetables, frozen vegetables, frozen foods, and popcorn.

The term "start button" means a user-operated button that initiates microwave generation by an oven upon manipulation by a user. The start button may be associated with a preset cooking time. The start button may be a single state or single input button (“on”), also referred to as a “single-input start button” or a “single input start button”. there is. The start button may not be a two state button ("on" or "off"). Thus, repeated pressing of the start button may not switch between the "on" and "off" states. Repeated pressing of the start button may not reset the preset cook time and/or may not add cook time to the initiated cook cycle. For example, a microwave oven may initiate generation of microwaves in response to a start button pressed by a user (start input), and further pressing of one or more start buttons (sequential input) initiates a cooking cycle. may not result in the addition of cooking time for In contrast to known microwave ovens in which the cooking time of a microwave oven must be set by the user at the start of each cooking cycle, in the microwave oven described herein the cooking time can be set in advance. Upon completion of the cook cycle, the preset cook time may remain associated with one or more start buttons.

The start button can be, for example, a push button, touch button, dial, knob, lever or switch. In one non-limiting example, the start button is a rectangular button substantially the width of the control panel or half the width of the control panel. In another non-limiting embodiment, the start button corresponds to at least half the width of the control panel.

The start button of the microwave oven described herein is a "single function button" or "single function start button". The start button is not a "multi-function button". A "single function button" or a "single function type button" means a button that executes one function upon user input. A single function button may not execute multiple functions. One example of a single function button is a single function start button that initiates the start and generation of microwaves in a microwave oven for a pre-set cooking time.

"Multi-function button" means a button that can select a plurality of functions of the microwave oven. For example, the user can select a first function of the microwave oven by pressing the multi-function button once, and a second function by pressing the multi-function button again. Depending on the number of times the multi-function button is pressed, each function of the microwave oven can be selected. Another example of a multi-function button is a dial-type knob, where multiple functions can be selected by dialing the knob to the desired function.

"Control button" means a user-operated button that controls an operation or function, such as, but not limited to, the power level of a microwave oven or the cooking time of a cooking cycle, but may not initiate the immediate generation of microwaves in the oven. means Thus, the control button may not include one or more start buttons. Control buttons include, but are not limited to, cook time button, power level button, additional time button, single number button, clear button, start standby button, defrost button or auto defrost button, auto reheat button, power off button, stop button, A clear button, such as a ready-to-cook button with pre-programmed settings for various food types such as meat, fish, cutlets, vegetables, frozen vegetables, frozen foods and popcorn, and/or associated with operation of the microwave oven. It can be provided with other member buttons that are present. In one embodiment, the control buttons may not include one or more clock setting buttons, one or more timer buttons, or one or more preset cook time buttons.

"Preset cooking time button", "preset cooking time button", "preset cooking button" or "preset cooking button" means a device for inputting or adjusting a preset cooking time by a user. means button. Programming of the preset cook time using the preset cook time button allows for customization of the preset cook time by the user. If the preset cook time has been set by the user, the time will be associated with one or more start buttons and will remain associated with one or more start buttons until changed by the user. The preset cook time remains associated with one or more start buttons during repeated cook cycles and is not automatically cleared at the end of the cook cycle. Thus, the cooking time may not have to be set at the beginning of every cooking cycle as in conventional microwave ovens. Accordingly, the preset cooking time may be multiple cooking cycles or preset cooking times, and the cooking cycle is initiated for the preset cooking time by pressing the start button.

In other embodiments, the preset cook time may be permanently associated with one or more start buttons and may not be user adjustable. For example, a microwave oven may come with a preset cooking time preset by the manufacturer of the microwave oven. In cases where a preset time is permanently associated with one or more start buttons, the microwave oven may not require a preset cook time button. Thus, in some embodiments, the microwave oven does not have a pre-set cook time button.

The preset cook time may be from about 5 seconds (sec) to 10 minutes (min), or any amount in between. For example, preset cooking times are 5 sec, 10 sec, 15 sec, 20 sec, 30 sec, 40 sec, 50 sec, 1 min, 1.5 min, 2 min, 2.5 min, 3 min, 4 min, 5 min. minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, or any amount in between. In a non-limiting example, the preset cook time may be 1 minute or 2 minutes.

Another aspect of the present invention is a means by which the microwave heating cycle is automatically terminated when the microwave oven door is opened while the microwave heating cycle is in progress, for a preset amount of time (preset cooking time). is automatically reset. For example, a door may have a door sensor for detecting an open state or a closed state of the door. A cook cycle can end prematurely by opening the microwave oven door or activating a door sensor. When the door is opened, all remaining cooking times are set to zero. Upon closing the door and pressing the start button, the initiated cooking cycle will continue for the preset cooking time unless terminated again by opening the door.

The door may have a door handle that opens the door. In an alternative embodiment, the door can be opened by depressing a push button located in the control panel of the microwave oven.

The microwave oven may further have a clock or clock panel, for example the clock panel may be a diode display.

The control panel of the microwave oven may further have an input panel for setting a pre-set cooking time and/or for setting the time of a clock that may be integrated into the microwave oven. The input panel may have a locking mechanism for locking the panel or the buttons of the panel, so that the buttons of the input panel will not be unintentionally pressed by the user. The locking device may be a cover or a flap. In another embodiment, the buttons of the panel may be lockable buttons.

The microwave oven may further have signaling means to inform the user on completion of the cooking cycle or to inform the user of problems that may occur during operation of the microwave oven. The signaling means activated at the end of the cooking cycle remain activated until the microwave oven is opened by the user. The signaling means may be preset for an extended activation time until the door of the microwave oven is opened by the user. The signal emitted by the signaling means may be, for example, a visible and/or audible signal. The signaling means may be, for example, a front panel light, a light such as a flashing alert light, a loudspeaker and/or an alarm system. The use of the signaling means may be optional, and the signaling means may be turned on or off using the on and off buttons which are parts of the input panel. Accordingly, the user may decide to operate the microwave oven at the end of the cooking cycle without the signaling means being activated.

When heated in a microwave oven, it is common for food to give off water vapor at any given stage of the heating process when the moisture in the food evaporates. The release of steam indicates how much heating is progressing at this time. If heating occurs at too high a power level, edge burning may occur in some cases, which may lead to the emission of smoke. If the cook time and power level are obviously set incorrectly, the food may catch fire or burn, which can cause thick smoke emissions. Accordingly, microwave ovens as described herein may further include smoke and/or vapor detectors to detect the presence of particles such as smoke and water vapor within the cooking chamber. If a smoke and/or steam detector is activated, an alarm will be activated to notify the user. The alarm may be an audible and/or visual alarm. Furthermore, activation of the smoke and/or steam detector may stop the cook cycle and reset the cook time to zero minutes.

The elements and members of the microwave oven described herein are for the convenience and safety of the user.

The description of the invention that follows relates to preferred embodiments of the microwave oven disclosed herein, examples of which are shown in the accompanying drawings. In describing the embodiments, like parts will be given like names and reference numbers.

The microwave oven 10 has a housing 11 defining an oven chamber 12 containing food to be microwaved. A microwave generator such as a microwave generator (not shown) is formed on one side of the housing 11 to generate and radiate microwaves of a constant frequency to food in the oven chamber 12 . Access to the oven chamber 12 is provided by a door and door handle 13 . The rotating plate 14 is supported inside the oven chamber 12 . Additionally, the microwave oven has a light emitting diode display 15 to display the time, and a microwave heating timer when a microwave heating cycle is in progress. In the embodiment shown in FIG. 1A and the embodiment shown in FIG. 2 , the displayed time is adjustable using buttons on the input panel 16 . In the embodiment of the microwave oven shown in FIG. 1A , the input panel 16 additionally provides a preset amount of time (preset cooking time) for the microwave heating cycle using the preset cook time button 20. time) to adjust the duration. The input panel 16 is covered by an input panel cover 17, which can prevent the user from making setting adjustments as well as minimize confusion for older users operating the microwave oven.

Referring to Figure 1A, the single input embodiment also consists of a large single input start button 18, which when activated can initiate microwave heating or a cook cycle for a preset cooking time. As shown in FIG. 1A, the single input start button 18 may be a button that is larger than the buttons of a conventional microwave, and has the words "START" written in bold and large letters on it. can To operate the single input embodiment, the user simply places food to be cooked or reheated in the oven chamber 12, closes the door using the door handle 13, and activates the signal input start button 18 ( eg by pushing the big "START" button), it will immediately start the microwave heating cycle without having to press any additional buttons. Activating the single input start button 18 with additional time will not double the time by the preset amount. For example, in a single input embodiment where the preset amount of time for a microwave heating cycle is 1.5 minutes, repeated pressing of the large "start" button causes the microwave heating cycle to take longer than 1.5 minutes. will not initiate To microwave food for longer than 1.5 minutes, the user must wait until the first 1.5 minute microwave heat cycle is complete, open the door to automatically reset the microwave heat timer, then another 1.5 minute microwave heat cycle. A "start" button should be pressed to initiate the minute microwave heating cycle.

Referring to Figure 2, the microwave oven interface of the two input embodiments consists of a first input start button 21 and a second input start button 22, when these buttons are activated, for example 2 minutes and 1 minute Microwave heating cycles can be initiated for a pre-set amount of time each lasting . As shown in FIG. 2, the two input units may be buttons that are larger than those of the conventional microwave oven, and the words "2 minutes" and "1 minute" are written in bold and large letters on the corresponding buttons. can have

To operate the two input embodiments, the user places food to be cooked or reheated in the oven chamber 12, closes the door using the door handle 13, then activates the first start button 21 or activating the second start button 22 (e.g. by pressing the “2 minutes” button), the first start button 21 is preset to last 2 minutes and the second start button 22 can immediately start a microwave heating cycle for a preset amount of time lasting 1 minute. Activating the first start button or the second start button multiple times or a combination of these buttons will not increase the duration of the microwave heating cycle, since the first start button 21 is activated for the first time. , in that it will not increase its duration for longer than 2 minutes, or will not increase its duration for longer than 1 minute if the second start button 22 is activated for the first time. It is true.

When the microwave heating or cooking cycle is complete, a beep alert may be activated to inform the user of the completion of the microwave heating cycle and to remind the user that there is food in the oven chamber 12. . The tone will continue to sound until the microwave oven door is opened and the microwave heat timer is reset. In embodiments where an optional flashing notification luminaire 19 is installed, the flashing notification luminaire may also be activated upon completion of the microwave heating operation, when the microwave oven door is opened and the microwave heating timer is reset. It may remain active until

As with conventional microwave ovens, opening the door while a microwave heating cycle is in progress will automatically stop the microwave heating cycle. However, unlike conventional microwave ovens, opening the microwave oven door will automatically reset the microwave oven heating time. For example, opening the microwave door with 32 seconds remaining for a pre-set amount of time for a microwave heating cycle will automatically reset the microwave heating timer for next use. In conventional microwave ovens, the remaining 32 seconds will be carried-over and added to the microwave heating time on the next use unless manually reset by the user.

Some embodiments may also include optional smoke and/or vapor detectors (not shown). Upon detection of smoke and/or steam in the oven chamber 12, the microwave heating cycle will automatically end, the microwave timer will be reset, the audible alarm will be activated, and an optional flashing notification luminaire (19 ) will be activated if present.

The invention has been described in terms of one or more embodiments. However, it will be apparent to those skilled in the art that many variations and modifications can be made without departing from the scope of the invention as defined in the claims.

Claims (19)

a main body forming a cooking chamber having a front opening;
a microwave generator for supplying microwaves to the cooking chamber;
a door movably mounted on the main body to selectively close the front opening;
a door sensor for detecting an open state of the door or a closed state of the door; and
control panel assembly;
A microwave oven having a, wherein the control panel assembly:
i) a control panel having a single input preset cook time start button for initiating microwave generation at a preset cooking time, the preset cooking time being set over one or more cooking cycles; It remains permanently associated with the input preset cook time start button, and furthermore, repeated pressing of the one single input preset cook time start button does not reset the preset cook time or initiate the cooking time. control panel, which does not add cooking time to the cycle; or
ii) a control panel having two single input preset cook time start buttons, each for initiating microwave generation at a preset cook time, wherein the preset cook times are set over one or more cook cycles to It remains permanently associated with each of the single input preset cook time start buttons, and repeated pressing of the two single input preset cook time start buttons does not reset the preset cook times or the without adding a cook time to the initiated cook cycle, furthermore, the two single input preset cook time start buttons are associated with a first preset cook time; a first single input preset cook time start button; a control panel comprising a second single input preset cook time start button associated with a second preset cook time different from the first preset cook time;
Microwave oven, characterized in that consisting of one of. delete According to claim 1,
The microwave oven further includes an input panel,
The input panel is:
one or more preset cooking time buttons for inputting a preset cooking time; and
a locking device for locking the input panel;
Microwave oven, characterized in that it comprises a. delete According to claim 1,
The microwave oven:
clock; and
a clock panel that includes a lock;
Microwave oven, characterized in that it further comprises. According to claim 5,
The microwave oven, characterized in that the locking device is a cover. According to claim 1,
The microwave oven, characterized in that it further comprises means for signaling when the preset cooking time is completed. According to claim 1,
smoke detector; and
vapor detector;
Microwave oven, characterized in that it further comprises one or more of. According to claim 8,
Activation of one or more of the smoke detector and the vapor detector activates a signaling device. According to claim 9,
The signaling device is:
front panel lighting means; and
alarm system;
Microwave oven, characterized in that it comprises one or more of. According to claim 10,
The signaling device is:
an activation timer preset to an activation time extended until the door of the microwave oven is arranged in the open state;
Microwave oven, characterized in that it further comprises. According to claim 8,
Activation of one of the smoke detector and the vapor detector stops the cooking cycle and resets the cooking time to zero minutes. According to claim 1,
turntable;
Microwave oven, characterized in that further comprising a. delete delete a main body forming a cooking chamber having a front opening;
a microwave generator for supplying microwaves to the cooking chamber;
a door movably mounted on the main body to selectively close the front opening;
a door sensor for detecting an open state of the door or a closed state of the door;
means for resetting a cooking time to zero minutes when the door is arranged in the open state; and
control panel assembly;
A microwave oven having a, wherein the control panel assembly:
i) a control panel having a first start button arrangement comprising a single input preset cook time start button associated with a preset cook time; or
ii) a control panel having a second start button arrangement comprising a first single input preset cook time start button and a second single input preset cook time start button, said first single input preset cook time start button; wherein the start button is associated with a first preset cook time and the second single input preset cook time start button is associated with a second preset cook time different from the first preset cook time; control panel;
consists of one of
The microwave oven, characterized in that the microwave oven further comprises a front panel lighting means for signaling when the first preset cooking time and / or the second preset cooking time is completed. According to claim 1,
The microwave oven according to claim 1, further comprising means for resetting the cooking time to 0 minutes when the door is arranged in the open state. According to claim 7,
The microwave oven according to claim 1 , wherein said means for signaling comprises a front panel illumination means. 17. The method of claim 16,
The microwave oven further includes an input panel,
The input panel is:
one or more preset cooking time buttons for inputting a preset cooking time; and
a locking device for locking the input panel;
Microwave oven, characterized in that it comprises a.

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